| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Discovery and Insertion of Next Generation Structural Materials
|
| Presentation Title |
Modeling of Microstructural Effects on Mechanical Properties of High Entropy Alloys at Mesoscale |
| Author(s) |
Thomas Ralph, Manish Vasoya, Vahid Attari, Dimitris C Lagoudas |
| On-Site Speaker (Planned) |
Manish Vasoya |
| Abstract Scope |
High Entropy Alloys (HEAs) are promising for next-generation structural materials due to their exceptional mechanical properties. The compositional variations in these alloys result in microstructural heterogeneities, such as grains, grain boundaries, second phase particles, and voids, which significantly affect properties like yielding and hardening. This talk explores the influence of grain-size distribution on the yielding and hardening behavior of HEAs. Our mesoscale incremental formulation hypothesizes that inelastic deformation occurs through the evolution of discrete grain yielding events. We use grain size distributions, calculated via phase-field method, as nucleation sites for inelastic deformation. These distributions provide nucleation strength through a Hall-Petch-like relation. Utilizing the Eshelby inclusion solution as an elastic interaction kernel, we compute stress redistribution upon grain yielding, enabling the study of both boundary and microstructural effects on mechanical properties. We will discuss stress-strain predictions for several HEAs with different compositions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Modeling and Simulation |